PNW - Spring 2008 Issue 16 - Counting All That Matters: Recognizing the Value of Ecosystem Services
Broadly defined, ecosystem services are the benefits healthy ecosystems provide to humans. Clean air, clean water, and flood control are just a few examples. Although the term is relatively new, the ecosystem services concept has long been a focus of natural resource and environmental economists.
The link address is: http://www.fs.fed.us/pnw/pubs/science-update-16.pdf
